Change string form of VIR_ARCH_ITANIUM back to ia64

Historically there was an inconsistency in handling of the
itanium arch. The xen driver & CPU model code treated it
as 'ia64' but the QEMU capabilities code used 'itanium'. On
the grounds that no one has ever seriously used  itanium
with QEMU, while RHEL shipped itanium with Xen, we should
favour 'ia64' as the canonical format

src/qemu/qemu_capabilities.c

@@ -251,8 +251,6 @@ VIR_ONCE_GLOBAL_INIT(qemuCaps)
 
 static virArch qemuCapsArchFromString(const char *arch)
 {
-    if (STREQ(arch, "ia64"))
-        return VIR_ARCH_ITANIUM;
     if (STREQ(arch, "i386"))
         return VIR_ARCH_I686;
     if (STREQ(arch, "arm"))
@@ -266,8 +264,6 @@ static const char *qemuCapsArchToString(virArch arch)
 {
     if (arch == VIR_ARCH_I686)
         return "i386";
-    else if (arch == VIR_ARCH_ITANIUM)
-        return "ia64";
     else if (arch == VIR_ARCH_ARMV7L)
         return "arm";
 

src/util/virarch.c

@@ -39,7 +39,7 @@ static const struct virArchData {
     { "cris",         32, VIR_ARCH_LITTLE_ENDIAN },
     { "i686",         32, VIR_ARCH_LITTLE_ENDIAN },
 
-    { "itanium",      64, VIR_ARCH_LITTLE_ENDIAN },
+    { "ia64",         64, VIR_ARCH_LITTLE_ENDIAN },
     { "lm32",         32, VIR_ARCH_BIG_ENDIAN },
     { "m68k",         32, VIR_ARCH_BIG_ENDIAN },
     { "microblaze",   32, VIR_ARCH_BIG_ENDIAN },
@@ -159,8 +159,6 @@ virArch virArchFromHost(void)
         ut.machine[3] == '6' &&
         ut.machine[4] == '\0') {
         arch = VIR_ARCH_I686;
-    } else if (STREQ(ut.machine, "ia64")) {
-        arch = VIR_ARCH_ITANIUM;
     } else if (STREQ(ut.machine, "amd64")) {
         arch = VIR_ARCH_X86_64;
     } else {